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        <h2>
          <span class="refentrytitle">pvsbuffer</span>
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        <p>pvsbuffer — 
        This opcode creates and writes to a circular buffer for f-signals (streaming PV signals).
    </p>
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        <h2>Description</h2>
        <p>
        This opcode sets up and writes to a circular buffer of length ilen (secs),
        giving a handle for the buffer and a time pointer, which holds the
        current write position (also in seconds). It can be used with one or 
        more <a class="link" href="pvsbufread.html" title="pvsbufread"><em class="citetitle">pvsbufread</em></a> opcodes. Writing is circular, wrapping around at the
        end of the buffer.
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        <h2>Syntax</h2>
        <pre class="synopsis">ihandle, ktime  <span class="command"><strong>pvsbuffer</strong></span> fsig, ilen </pre>
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        <h2>Initialisation</h2>
        <p>
      <span class="emphasis"><em>ihandle</em></span> -- handle identifying this particular buffer, which should be passed to a reader opcode.
    </p>
        <p>
      <span class="emphasis"><em>ilen</em></span> -- buffer length in seconds.
    </p>
        <p>
      <span class="emphasis"><em>fsig</em></span> -- an input pv stream
    </p>
        <p>
      <span class="emphasis"><em>ktime</em></span> -- the current time of writing in the buffer
    </p>
        <p>
        <span class="emphasis"><em>pvsbuffer</em></span> stores <span class="emphasis"><em>fsig</em></span> in a buffer which can be read by <a class="link" href="pvsbufread.html" title="pvsbufread"><em class="citetitle">pvsbufread</em></a> using the handle <span class="emphasis"><em>ihandle</em></span>. Different buffers will have different handles so they can be read independently by different <a class="link" href="pvsbufread.html" title="pvsbufread"><em class="citetitle">pvsbufread</em></a> opcodes. <span class="emphasis"><em>pvsbuffer</em></span> gives in its output the current time (<span class="emphasis"><em>ktime</em></span>) inside the ring buffer which has just been written.
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        <h2>Examples</h2>
        <p>
      See <a class="link" href="pvsbufread.html" title="pvsbufread"><em class="citetitle">pvsbufread</em></a> for examples of the pvsbuffer opcode.
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        <h2>See also</h2>
        <p>
      <a class="link" href="pvsbufread.html" title="pvsbufread"><em class="citetitle">pvsbufread</em></a>
    </p>
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        <h2>Credits</h2>
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            <td>Author: Victor Lazzarini</td>
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            <td>July 2007</td>
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